mirror of
https://github.com/futurepress/epub.js.git
synced 2025-10-04 15:09:16 +02:00
handle compressed epubs
This commit is contained in:
Fred Chasen
parent
0cfaa9cf2e
commit
cb813ab927
26 changed files with 5593 additions and 4871 deletions
334
libs/zip/zip.js
334
libs/zip/zip.js
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@ -1,5 +1,5 @@
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/*
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Copyright (c) 2012 Gildas Lormeau. All rights reserved.
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Copyright (c) 2013 Gildas Lormeau. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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@ -36,24 +36,19 @@
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var ERR_WRITE_DATA = "Error while writing file data.";
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var ERR_READ_DATA = "Error while reading file data.";
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var ERR_DUPLICATED_NAME = "File already exists.";
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var ERR_HTTP_RANGE = "HTTP Range not supported.";
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var CHUNK_SIZE = 512 * 1024;
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var INFLATE_JS = "inflate.js";
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var DEFLATE_JS = "deflate.js";
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var BlobBuilder = obj.WebKitBlobBuilder || obj.MozBlobBuilder || obj.MSBlobBuilder || obj.BlobBuilder;
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var TEXT_PLAIN = "text/plain";
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var MESSAGE_EVENT = "message";
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var appendABViewSupported;
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function isAppendABViewSupported() {
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if (typeof appendABViewSupported == "undefined") {
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var blobBuilder;
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blobBuilder = new BlobBuilder();
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blobBuilder.append(getDataHelper(0).view);
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appendABViewSupported = blobBuilder.getBlob().size == 0;
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}
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return appendABViewSupported;
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try {
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appendABViewSupported = new Blob([ new DataView(new ArrayBuffer(0)) ]).size === 0;
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} catch (e) {
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}
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function Crc32() {
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@ -113,9 +108,10 @@
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var that = this, blobReader;
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function init(callback, onerror) {
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var blobBuilder = new BlobBuilder();
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blobBuilder.append(text);
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blobReader = new BlobReader(blobBuilder.getBlob("text/plain"));
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var blob = new Blob([ text ], {
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type : TEXT_PLAIN
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});
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blobReader = new BlobReader(blob);
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blobReader.init(function() {
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that.size = blobReader.size;
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callback();
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@ -136,7 +132,7 @@
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function Data64URIReader(dataURI) {
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var that = this, dataStart;
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function init(callback, onerror) {
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function init(callback) {
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var dataEnd = dataURI.length;
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while (dataURI.charAt(dataEnd - 1) == "=")
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dataEnd--;
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@ -145,7 +141,7 @@
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callback();
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}
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function readUint8Array(index, length, callback, onerror) {
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function readUint8Array(index, length, callback) {
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var i, data = getDataHelper(length);
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var start = Math.floor(index / 3) * 4;
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var end = Math.ceil((index + length) / 3) * 4;
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@ -166,7 +162,7 @@
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function BlobReader(blob) {
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var that = this;
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function init(callback, onerror) {
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function init(callback) {
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this.size = blob.size;
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callback();
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}
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@ -187,93 +183,6 @@
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BlobReader.prototype = new Reader();
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BlobReader.prototype.constructor = BlobReader;
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function HttpReader(url) {
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var that = this;
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function getData(callback, onerror) {
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var request;
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if (!that.data) {
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request = new XMLHttpRequest();
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request.addEventListener("load", function() {
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if (!that.size)
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that.size = Number(request.getResponseHeader("Content-Length"));
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that.data = new Uint8Array(request.response);
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callback();
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}, false);
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request.addEventListener("error", onerror, false);
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request.open("GET", url);
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request.responseType = "arraybuffer";
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request.send();
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} else
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callback();
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}
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function init(callback, onerror) {
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var request = new XMLHttpRequest();
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request.addEventListener("load", function() {
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that.size = Number(request.getResponseHeader("Content-Length"));
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callback();
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}, false);
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request.addEventListener("error", onerror, false);
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request.open("HEAD", url);
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request.send();
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}
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function readUint8Array(index, length, callback, onerror) {
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getData(function() {
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callback(new Uint8Array(that.data.subarray(index, index + length)));
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}, onerror);
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}
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that.size = 0;
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that.init = init;
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that.readUint8Array = readUint8Array;
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}
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HttpReader.prototype = new Reader();
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HttpReader.prototype.constructor = HttpReader;
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function HttpRangeReader(url) {
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var that = this;
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function init(callback, onerror) {
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var request = new XMLHttpRequest();
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request.addEventListener("load", function() {
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that.size = Number(request.getResponseHeader("Content-Length"));
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if (request.getResponseHeader("Accept-Ranges") == "bytes")
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callback();
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else
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onerror(ERR_HTTP_RANGE);
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}, false);
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request.addEventListener("error", onerror, false);
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request.open("HEAD", url);
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request.send();
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}
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function readArrayBuffer(index, length, callback, onerror) {
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var request = new XMLHttpRequest();
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request.open("GET", url);
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request.responseType = "arraybuffer";
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request.setRequestHeader("Range", "bytes=" + index + "-" + (index + length - 1));
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request.addEventListener("load", function() {
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callback(request.response);
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}, false);
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request.addEventListener("error", onerror, false);
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request.send();
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}
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function readUint8Array(index, length, callback, onerror) {
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readArrayBuffer(index, length, function(arraybuffer) {
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callback(new Uint8Array(arraybuffer));
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}, onerror);
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}
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that.size = 0;
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that.init = init;
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that.readUint8Array = readUint8Array;
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}
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HttpRangeReader.prototype = new Reader();
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HttpRangeReader.prototype.constructor = HttpRangeReader;
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// Writers
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function Writer() {
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@ -282,26 +191,30 @@
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callback(this.data);
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};
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function TextWriter() {
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var that = this, blobBuilder;
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function TextWriter(encoding) {
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var that = this, blob;
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function init(callback, onerror) {
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blobBuilder = new BlobBuilder();
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function init(callback) {
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blob = new Blob([], {
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type : TEXT_PLAIN
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});
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callback();
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}
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function writeUint8Array(array, callback, onerror) {
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blobBuilder.append(isAppendABViewSupported() ? array : array.buffer);
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function writeUint8Array(array, callback) {
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blob = new Blob([ blob, appendABViewSupported ? array : array.buffer ], {
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type : TEXT_PLAIN
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});
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callback();
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}
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function getData(callback) {
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function getData(callback, onerror) {
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var reader = new FileReader();
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reader.onload = function(e) {
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callback(e.target.result);
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};
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reader.onerror = onerror;
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reader.readAsText(blobBuilder.getBlob("text/plain"));
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reader.readAsText(blob, encoding);
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}
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that.init = init;
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@ -314,12 +227,12 @@
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function Data64URIWriter(contentType) {
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var that = this, data = "", pending = "";
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function init(callback, onerror) {
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function init(callback) {
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data += "data:" + (contentType || "") + ";base64,";
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callback();
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}
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function writeUint8Array(array, callback, onerror) {
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function writeUint8Array(array, callback) {
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var i, delta = pending.length, dataString = pending;
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pending = "";
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for (i = 0; i < (Math.floor((delta + array.length) / 3) * 3) - delta; i++)
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@ -344,53 +257,25 @@
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Data64URIWriter.prototype = new Writer();
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Data64URIWriter.prototype.constructor = Data64URIWriter;
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function FileWriter(fileEntry, contentType) {
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var writer, that = this;
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function init(callback, onerror) {
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fileEntry.createWriter(function(fileWriter) {
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writer = fileWriter;
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callback();
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}, onerror);
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}
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function writeUint8Array(array, callback, onerror) {
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var blobBuilder = new BlobBuilder();
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blobBuilder.append(isAppendABViewSupported() ? array : array.buffer);
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writer.onwrite = function() {
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writer.onwrite = null;
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callback();
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};
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writer.onerror = onerror;
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writer.write(blobBuilder.getBlob(contentType));
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}
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function getData(callback) {
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fileEntry.file(callback);
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}
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that.init = init;
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that.writeUint8Array = writeUint8Array;
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that.getData = getData;
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}
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FileWriter.prototype = new Writer();
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FileWriter.prototype.constructor = FileWriter;
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function BlobWriter(contentType) {
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var blobBuilder, that = this;
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var blob, that = this;
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function init(callback, onerror) {
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blobBuilder = new BlobBuilder();
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function init(callback) {
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blob = new Blob([], {
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type : contentType
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});
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callback();
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}
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function writeUint8Array(array, callback, onerror) {
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blobBuilder.append(isAppendABViewSupported() ? array : array.buffer);
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function writeUint8Array(array, callback) {
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blob = new Blob([ blob, appendABViewSupported ? array : array.buffer ], {
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type : contentType
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});
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callback();
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}
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function getData(callback) {
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callback(blobBuilder.getBlob(contentType));
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callback(blob);
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}
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that.init = init;
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@ -406,13 +291,12 @@
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var chunkIndex = 0, index, outputSize;
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function onflush() {
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worker.removeEventListener("message", onmessage, false);
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worker.removeEventListener(MESSAGE_EVENT, onmessage, false);
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onend(outputSize);
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}
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function onmessage(event) {
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var message = event.data, data = message.data;
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if (message.onappend) {
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outputSize += data.length;
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writer.writeUint8Array(data, function() {
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@ -453,7 +337,7 @@
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}
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outputSize = 0;
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worker.addEventListener("message", onmessage, false);
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worker.addEventListener(MESSAGE_EVENT, onmessage, false);
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step();
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}
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@ -528,13 +412,13 @@
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}
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function onmessage() {
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worker.removeEventListener("message", onmessage, false);
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worker.removeEventListener(MESSAGE_EVENT, onmessage, false);
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launchWorkerProcess(worker, reader, writer, 0, reader.size, ondeflateappend, onprogress, ondeflateend, onreaderror, onwriteerror);
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}
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if (obj.zip.useWebWorkers) {
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worker = new Worker(obj.zip.workerScriptsPath + DEFLATE_JS);
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worker.addEventListener("message", onmessage, false);
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worker.addEventListener(MESSAGE_EVENT, onmessage, false);
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worker.postMessage({
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init : true,
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level : level
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@ -589,29 +473,8 @@
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return out;
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}
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function decodeUTF8(str_data) {
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var tmp_arr = [], i = 0, ac = 0, c1 = 0, c2 = 0, c3 = 0;
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str_data += '';
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while (i < str_data.length) {
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c1 = str_data.charCodeAt(i);
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if (c1 < 128) {
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tmp_arr[ac++] = String.fromCharCode(c1);
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i++;
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} else if (c1 > 191 && c1 < 224) {
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c2 = str_data.charCodeAt(i + 1);
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tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
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i += 2;
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} else {
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c2 = str_data.charCodeAt(i + 1);
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c3 = str_data.charCodeAt(i + 2);
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tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
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i += 3;
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}
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}
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return tmp_arr.join('');
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function decodeUTF8(string) {
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return decodeURIComponent(escape(string));
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}
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function getString(bytes) {
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@ -630,7 +493,7 @@
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}
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}
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function readCommonHeader(entry, data, index, centralDirectory) {
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function readCommonHeader(entry, data, index, centralDirectory, onerror) {
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entry.version = data.view.getUint16(index, true);
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entry.bitFlag = data.view.getUint16(index + 2, true);
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entry.compressionMethod = data.view.getUint16(index + 4, true);
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@ -697,7 +560,7 @@
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onerror(ERR_BAD_FORMAT);
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return;
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}
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readCommonHeader(that, data, 4);
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readCommonHeader(that, data, 4, false, onerror);
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dataOffset = that.offset + 30 + that.filenameLength + that.extraFieldLength;
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writer.init(function() {
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if (that.compressionMethod === 0)
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@ -708,18 +571,28 @@
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}, onreaderror);
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};
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function seekEOCDR(offset, entriesCallback) {
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reader.readUint8Array(reader.size - offset, offset, function(bytes) {
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var dataView = getDataHelper(bytes.length, bytes).view;
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if (dataView.getUint32(0) != 0x504b0506) {
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seekEOCDR(offset + 1, entriesCallback);
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} else {
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entriesCallback(dataView);
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}
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}, function() {
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onerror(ERR_READ);
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});
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}
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return {
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getEntries : function(callback) {
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if (reader.size < 22) {
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onerror(ERR_BAD_FORMAT);
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return;
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}
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reader.readUint8Array(reader.size - 22, 22, function(bytes) {
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var dataView = getDataHelper(bytes.length, bytes).view, datalength, fileslength;
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if (dataView.getUint32(0) != 0x504b0506) {
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onerror(ERR_BAD_FORMAT);
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return;
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}
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// look for End of central directory record
|
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seekEOCDR(22, function(dataView) {
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var datalength, fileslength;
|
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datalength = dataView.getUint32(16, true);
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fileslength = dataView.getUint16(8, true);
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reader.readUint8Array(datalength, reader.size - datalength, function(bytes) {
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@ -730,7 +603,7 @@
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onerror(ERR_BAD_FORMAT);
|
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return;
|
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}
|
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readCommonHeader(entry, data, index + 6, true);
|
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readCommonHeader(entry, data, index + 6, true, onerror);
|
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entry.commentLength = data.view.getUint16(index + 32, true);
|
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entry.directory = ((data.view.getUint8(index + 38) & 0x10) == 0x10);
|
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entry.offset = data.view.getUint32(index + 42, true);
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|
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@ -748,8 +621,6 @@
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}, function() {
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onerror(ERR_READ);
|
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});
|
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}, function() {
|
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onerror(ERR_READ);
|
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});
|
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},
|
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close : function(callback) {
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||||
|
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@ -762,26 +633,7 @@
|
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// ZipWriter
|
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|
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function encodeUTF8(string) {
|
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var n, c1, enc, utftext = [], start = 0, end = 0, stringl = string.length;
|
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for (n = 0; n < stringl; n++) {
|
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c1 = string.charCodeAt(n);
|
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enc = null;
|
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if (c1 < 128)
|
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end++;
|
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else if (c1 > 127 && c1 < 2048)
|
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enc = String.fromCharCode((c1 >> 6) | 192) + String.fromCharCode((c1 & 63) | 128);
|
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else
|
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enc = String.fromCharCode((c1 >> 12) | 224) + String.fromCharCode(((c1 >> 6) & 63) | 128) + String.fromCharCode((c1 & 63) | 128);
|
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if (enc != null) {
|
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if (end > start)
|
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utftext += string.slice(start, end);
|
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utftext += enc;
|
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start = end = n + 1;
|
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}
|
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}
|
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if (end > start)
|
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utftext += string.slice(start, stringl);
|
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return utftext;
|
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return unescape(encodeURIComponent(string));
|
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}
|
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|
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function getBytes(str) {
|
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|
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@ -792,7 +644,7 @@
|
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}
|
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|
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function createZipWriter(writer, onerror, dontDeflate) {
|
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var worker, files = [], filenames = [], datalength = 0;
|
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var worker, files = {}, filenames = [], datalength = 0;
|
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|
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function terminate(callback, message) {
|
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if (worker)
|
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|
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@ -828,7 +680,7 @@
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header.view.setUint32(0, 0x14000808);
|
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if (options.version)
|
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header.view.setUint8(0, options.version);
|
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if (!dontDeflate && options.level != 0)
|
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if (!dontDeflate && options.level !== 0 && !options.directory)
|
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header.view.setUint16(4, 0x0800);
|
||||
header.view.setUint16(6, (((date.getHours() << 6) | date.getMinutes()) << 5) | date.getSeconds() / 2, true);
|
||||
header.view.setUint16(8, ((((date.getFullYear() - 1980) << 4) | (date.getMonth() + 1)) << 5) | date.getDate(), true);
|
||||
|
|
@ -836,7 +688,6 @@
|
|||
data = getDataHelper(30 + filename.length);
|
||||
data.view.setUint32(0, 0x504b0304);
|
||||
data.array.set(header.array, 4);
|
||||
data.array.set([], 30); // FIXME: remove when chrome 18 will be stable (14: OK, 16: KO, 17: OK)
|
||||
data.array.set(filename, 30);
|
||||
datalength += data.array.length;
|
||||
writer.writeUint8Array(data.array, callback, onwriteerror);
|
||||
|
|
@ -867,13 +718,15 @@
|
|||
name = name.trim();
|
||||
if (options.directory && name.charAt(name.length - 1) != "/")
|
||||
name += "/";
|
||||
if (files[name])
|
||||
throw ERR_DUPLICATED_NAME;
|
||||
if (files.hasOwnProperty(name)) {
|
||||
onerror(ERR_DUPLICATED_NAME);
|
||||
return;
|
||||
}
|
||||
filename = getBytes(encodeUTF8(name));
|
||||
filenames.push(name);
|
||||
writeHeader(function() {
|
||||
if (reader)
|
||||
if (dontDeflate || options.level == 0)
|
||||
if (dontDeflate || options.level === 0)
|
||||
copy(reader, writer, 0, reader.size, true, writeFooter, onprogress, onreaderror, onwriteerror);
|
||||
else
|
||||
worker = deflate(reader, writer, options.level, writeFooter, onprogress, onreaderror, onwriteerror);
|
||||
|
|
@ -888,14 +741,14 @@
|
|||
writeFile();
|
||||
},
|
||||
close : function(callback) {
|
||||
var data, length = 0, index = 0;
|
||||
filenames.forEach(function(name) {
|
||||
var file = files[name];
|
||||
var data, length = 0, index = 0, indexFilename, file;
|
||||
for (indexFilename = 0; indexFilename < filenames.length; indexFilename++) {
|
||||
file = files[filenames[indexFilename]];
|
||||
length += 46 + file.filename.length + file.comment.length;
|
||||
});
|
||||
}
|
||||
data = getDataHelper(length + 22);
|
||||
filenames.forEach(function(name) {
|
||||
var file = files[name];
|
||||
for (indexFilename = 0; indexFilename < filenames.length; indexFilename++) {
|
||||
file = files[filenames[indexFilename]];
|
||||
data.view.setUint32(index, 0x504b0102);
|
||||
data.view.setUint16(index + 4, 0x1400);
|
||||
data.array.set(file.headerArray, index + 6);
|
||||
|
|
@ -906,7 +759,7 @@
|
|||
data.array.set(file.filename, index + 46);
|
||||
data.array.set(file.comment, index + 46 + file.filename.length);
|
||||
index += 46 + file.filename.length + file.comment.length;
|
||||
});
|
||||
}
|
||||
data.view.setUint32(index, 0x504b0506);
|
||||
data.view.setUint16(index + 8, filenames.length, true);
|
||||
data.view.setUint16(index + 10, filenames.length, true);
|
||||
|
|
@ -921,42 +774,13 @@
|
|||
};
|
||||
}
|
||||
|
||||
if (typeof BlobBuilder == "undefined") {
|
||||
BlobBuilder = function() {
|
||||
var that = this, blobParts;
|
||||
|
||||
function initBlobParts() {
|
||||
if (!blobParts) {
|
||||
blobParts = [ new Blob() ]
|
||||
}
|
||||
}
|
||||
|
||||
that.append = function(data) {
|
||||
initBlobParts();
|
||||
blobParts.push(data);
|
||||
};
|
||||
that.getBlob = function(contentType) {
|
||||
initBlobParts();
|
||||
if (blobParts.length > 1 || blobParts[0].type != contentType) {
|
||||
blobParts = [ contentType ? new Blob(blobParts, {
|
||||
type : contentType
|
||||
}) : new Blob(blobParts) ];
|
||||
}
|
||||
return blobParts[0];
|
||||
};
|
||||
};
|
||||
}
|
||||
|
||||
obj.zip = {
|
||||
Reader : Reader,
|
||||
Writer : Writer,
|
||||
BlobReader : BlobReader,
|
||||
HttpReader : HttpReader,
|
||||
HttpRangeReader : HttpRangeReader,
|
||||
Data64URIReader : Data64URIReader,
|
||||
TextReader : TextReader,
|
||||
BlobWriter : BlobWriter,
|
||||
FileWriter : FileWriter,
|
||||
Data64URIWriter : Data64URIWriter,
|
||||
TextWriter : TextWriter,
|
||||
createReader : function(reader, callback, onerror) {
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue